Rotary blower



(No Model.) 3 Sheets-Sheet 1.

T. W. GREEN.

ROTARY BLOWER. No. 515,212. Patented Feb. 20, 1894.

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3 Sheets-Sheet 3. T. W. GREEN.

ROTARY BLOWER.

No. 515,212. Patented Feb. 20,

Q ggg INVENTOR ATTOH'NEY.

UNrrs STATES THOMAS W. GREEN, OF PHILADELPHIA, PENNSYLVANIA.

ROTARY BLOWER.

SPECIFICATION forming part of Letters Patent No. 515,212, dated February 20, 1894.

Application filed June 5, 1893. Serial No. 47 1 (N m To aZZ whom it may concern:

Be it known that I, THOMAS W. GREEN, a

Y citizen of the United States, residing at Phila delphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Rotary Blowers; andI do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which .form a part of this specification.

My invention relates to rotary blast blowers for forcing or exhausting currents of air, water and similar fluids, and the object is to construct a simple and effective machine that will do the largest amount of work with the least possible expenditure of power. To accomplish this result- I mount upon suitable driving shafts, lying in a support parallel to each other and inclosed in a proper air tight casing, two iron frames commonly called revolvers. Each of these revolvers is provided with two blades or wings for taking in the air or other fluid, and has the parts lying between the said wings or blades formed in such shapes that those parts of the two revolvers will fit into and upon each other as the revolvers turn around and thus form a lock or cut off to prevent the escape of the air onwater taken in, except by the outlet provided and in the manner described. The two wings on each revolver are located exactly opposite to each other and the cut off mechanism midway between each of said wings. The revolvers are secured upon their respective driving shafts in such a position that when the wings of one revolver are in a vertical position,the wings of the other revolver will lie horizontally and exactly at right angles to the first one. This position will allow the wings to pass each other without striking and the cut off mechanism of one revolver to act in conjunction with the similar parts on the other revolver and thus forming a complete lock or cut ofi. The exact relative position of each revolver is positively maintained by means of two gear wheels secured upon the ends of the respective driving shafts.

In the accompanying drawings Figure 1, is

an end elevation of my improved blower showing the driving pulleys and gear wheels. Fig. 2, is a cross section of the blower. Fig. 3,'is a front elevation. nal vertical section through one of the revolvers and its driving shaft. Fig. 5, is a cross section of one of the revolvers removed from the driving shaft. Fig. 6, is a longitudinal vertical section of one of the revolvers through the wings and end heads.

A, represents the base or bed plate of the blower.

B, B, are the end castings forming the supports for the driving shafts and the operating parts of the machine, these end supports are cast with a recessed portion B.

O, is the external casing bolted upon the end supports, and surrounding the revolvers.

D, D, are two driving shafts extending through the blower and projecting some distance beyond each of the end supports.

E, E, are the revolvers on the shafts D, D.

E, E, are solid heads on the ends of the revolvers, these heads are made integral with other portions of the revolvers and have therein a recessed portion e, for the reception of' any material necessary to secure a proper balance of the parts.

e, is a wide face formed on the outer circumference of the heads E. These faces are about two and one-half inches wide and are turned to a circle thediameter of which is the distance between the centers of the two driving shafts D, D.

a, a, are flat Wings or blades on the revolvers, each revolver being provided with two of these wings secured thereon in the position shown in Figs. 2, 5 and 6, and they may be integral therewith or made in separate pieces and bolted or riveted on. p

b, b, b, b, are four short segmental extensions formed on each of the revolvers,at the points shown in Figs. 2 and 5. c, c, c, c, are four other and larger segmental extensions formed on each of the revolvers. 'The parts b, on one revolver work in conjunction with the parts 0, on the other revolver and together they form the complete cut off.

F, F, are driving pulleys secured on the driving shafts D.

G, is the driving belt connected with a motive power.

Fig. 4, is a longitudi- H, H, are gear wheels secured on the ends of the driving shafts outside of the casing C. These gear wheels are for the purpose of giving a positively uniform motion to the two shafts D, D, any slipping of the driving belt being corrected thereby and a variation of speed made impossible.

d, is a belt tightening idler pulley secured to the frame.

a, is the intake for the air or water.

b, is the outlet or discharge.

The outer surfaces of the short extensions b, b, are segments of a circle the center of which is the center of the driving shaft, the diameter of said circle being the distance between the centers of the driving shafts D, D. The outer surfaces of the long extensions 0, c, are segments of a circle the radius of which is the distance in a straight line from the middle part of one of the blades a, to the nearest point of one of the short extensions 1), the measurement being taken from a point at the base of the blade at, where the circle forming the extensions 1) would touch the said blade. The center of these circles would be located on the circumference of the circle forming the segments b, midway between the two blades a a. When the extensions 19 and c are formed to circles of correct diameters, the short extensions b, on one revolver will meet the long extension 0, on the opposite revolver and follow along on the upper surface thereof, until the two short extensions meet, after which the parts 19 and c begin to separate as the revolvers turn around; Before a complete separation of these parts takes place however, the similar parts immediately following begin to operate,

t consequently there is maintained at all times a complete cut off or look thus preventing the backward flow of the fluid acted upon. The revolvers are placed in the supports so that the faces 6, e, of the heads E, E, just touch each other, thus forming an aid or auxiliary to the gear wheels should any break occur therein. The heads E being made integral with the other or middle portions, the whole revolver is thus made much stronger.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-- 1. In a rotary blower or exhausterthe combination of two revolvers E, E, each revolver being provided with two blades or wings, and having between said blades, at either side thereof, short segmental extensions 1), and long segmental extensions 0, the long segmental extension c, on' one revolver being adapted to engage a short segmental extension on the opposite revolver, and the short extensions on each revolver being adapted to engage the short extension on the other, to form a cut-off, as set forth.

. 2. In a rotary blower or exhauster the combination of two revolvers surrounded by an outer casing, each revolver having thereon two fiat blades or wings, and between the two wings provided with the segmental extensions b and c, the extensions 1), being formed to a circle the diameter of which is the distance between the centers of the driving shafts of said revolvers and the outer surface of the segmental extensions 0, being formed to a circle that will conform to the forward end of the extension 6 and co-operate therewith to form a cut oif, as the revolvers turn around, substantially as shown and for the purpose described.

3. In a rotary bloweror exhauster the combination of the two revolvers E, E,having the solid heads E, E, integral with the middle portions thereof, said middleportion being provided with two flat wings or blades and bet-ween the wings having cut away portion provided with the short segmental extensions 17,1), and the longer segmental extensions a, substantially as and for the purpose described.

4:. In a rotary blower or exhauster the combination of two revolvers E, E, having the solid heads E, E, provided with the circular faces 6, said faces working together in pairs and touching each other; the middle portion of each of the revolvers being provided with two fiat wings or blades and between said wings having the short segmental extensions 1) and the longer segmental extensions 0, all arranged substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS W. GREEN. 

